add QTVulkan example

example/Vulkan/QtVulkanWindow.cpp

@@ -0,0 +1,25 @@
+#include"QtVulkanWindow.h"
+
+void VulkanRenderer::initResources()
+{
+    m_devFuncs=m_window->vulkanInstance()->deviceFunctions(m_window->device());
+
+}
+
+void VulkanRenderer::initSwapChainResources()
+{
+}
+
+void VulkanRenderer::releaseSwapChainResources()
+{
+}
+
+void VulkanRenderer::releaseResources()
+{
+}
+
+void VulkanRenderer::startNextFrame()
+{
+    m_window->frameReady();
+    m_window->requestUpdate(); // render continuously, throttled by the presentation rate        
+}